How do I access specific elements from a multi-dimensional array?
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Given a milti-dimensional (say 3) array A, I want to access the elements at indices [
], [
] and [ 
].
], [] and [ ]. If I define 
and similarly 
and 
. Then I get A(xi,yi,zi) = 
elements. Which is formed all pairs of indices from the array. Thats not what I need. .
and similarly and . Then I get A(xi,yi,zi) = elements. Which is formed all pairs of indices from the array. Thats not what I need. . How can I get the m pairs - A(xi_i, yi_i, zi_i) ?
回答（1 个）
Walter Roberson
2019-2-6
A( sub2ind( size(A), xi, yi, zi ) )
There is a mathematical formula that can be used to convert the indices instead of using sub2ind, but most of the time doing so is less clear.
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2019-2-6
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